<ARTICLE> UT
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE JUNE 30,
1997 FINANCIAL STATEMENTS INCLUDED IN INTERSTATE ENERGY CORPORATION'S FORM 10-Q
AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.  CERTAIN
ADJUSTMENTS HAVE BEEN MADE TO THE PRIOR PERIOD AMOUNTS AS PART OF THE RESTATEMENT
TO REFLECT THE POOLING OF INTERESTS TRANSACTION.
</LEGEND>
<RESTATED>
<CIK>  0000352541 
<NAME> INTERSTATE ENERGY CORPORATION
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               JUN-30-1997
<BOOK-VALUE>                                  PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                    3,086,472
<OTHER-PROPERTY-AND-INVEST>                    648,909
<TOTAL-CURRENT-ASSETS>                         420,725
<TOTAL-DEFERRED-CHARGES>                       159,384
<OTHER-ASSETS>                                 378,050
<TOTAL-ASSETS>                               4,693,540
<COMMON>                                           762
<CAPITAL-SURPLUS-PAID-IN>                      861,265
<RETAINED-EARNINGS>                            584,453
<TOTAL-COMMON-STOCKHOLDERS-EQ>               1,446,480
<PREFERRED-MANDATORY>                           24,205
<PREFERRED>                                     89,102
<LONG-TERM-DEBT-NET>                         1,358,897
<SHORT-TERM-NOTES>                              55,005
<LONG-TERM-NOTES-PAYABLE>                       56,975
<COMMERCIAL-PAPER-OBLIGATIONS>                 207,200
<LONG-TERM-DEBT-CURRENT-PORT>                   74,470
<PREFERRED-STOCK-CURRENT>                            0
<CAPITAL-LEASE-OBLIGATIONS>                     13,816
<LEASES-CURRENT>                                13,937
<OTHER-ITEMS-CAPITAL-AND-LIAB>               1,353,453
<TOT-CAPITALIZATION-AND-LIAB>                4,693,540
<GROSS-OPERATING-REVENUE>                    1,157,491
<INCOME-TAX-EXPENSE>                            37,316<F1>
<OTHER-OPERATING-EXPENSES>                   1,003,756
<TOTAL-OPERATING-EXPENSES>                   1,003,756<F1>
<OPERATING-INCOME-LOSS>                        153,735
<OTHER-INCOME-NET>                               7,577 
<INCOME-BEFORE-INTEREST-EXPEN>                 161,312
<TOTAL-INTEREST-EXPENSE>                        56,934
<NET-INCOME>                                    67,062
<PREFERRED-STOCK-DIVIDENDS>                      3,346
<EARNINGS-AVAILABLE-FOR-COMM>                   63,716
<COMMON-STOCK-DIVIDENDS>                        72,492
<TOTAL-INTEREST-ON-BONDS>                       88,295
<CASH-FLOW-OPERATIONS>                         195,950
<EPS-PRIMARY>                                     0.84
<EPS-DILUTED>                                     0.84
<FN>
<F1> Income tax expense is not included in Operating Expenses in the Consolidated
Statements of Income.
</FN>